Demonstration of how to make rotating, walkable geometry. This is a simple test level (playable, but not very interesting) in response to a forum question.

Note how the planet is not exactly positioned on the radialforcefield, to avoid an ODE crash when the geometry is exactly aligned with the force field.

Screenshot 2 also demonstrates that, contrary to popular belief, it is possible for strands to break given enough force. The chain is being stretched by friction of the Ivy balls on the planet, and is about to snap.